Dependency on a deployed CDI module - beans are not injected

I want to deploy two modules to wildfly 8.2.0 The module-a contains beans (and later CDI producer and other stuff) and module-b use this beans. Beans from module-a should be injected with CDI in module-b (There is a beans.xml in both modules.). All works fine if the module-a is direct referenced as dependency like this:
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
<deployment>
<dependencies>
<module name="deployment.module-a-1.0.0.jar" meta-inf="import" />
</dependencies>
</deployment>
</jboss-deployment-structure>

But the dependency to module-a should be without to know the deployed version, so I tried to set a module alias and (or) to re-export module-a under a different name like this.
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
<deployment>
<module-alias name="deployment.module-a-alias" />
</deployment>
</jboss-deployment-structure>

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
<module name="deployment.module-a">
<module-alias name="deployment.module-a-alias" />
<dependencies>
<module name="deployment.module-a-1.0.0.jar" export="true" meta-inf="export" />
</dependencies>
</module>
</jboss-deployment-structure>

But either the module alias or a re-export under a new module name worked. The reported exception is always:
Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type XYZ with qualifiers @Default

The module alias fit my requirements and I guess is should work with CDI but it dosn't.
Two questions:

• Why CDI don't work with module alias and module re-export?
• How to deal with dependencies and module versions?